Natural Gas Flashcards
(33 cards)
Methane has no toxic components or health hazards associated with it. But in heavy concentrations it will do what?
Displace oxygen
What is the vapor density of methane?
.55 so it’s lighter than air
What is the odorant that is added to natural gas as a safety precaution?
Mercaptan
Are transmission pipelines and railcars odorized with mercaptan?
No
What is the flammable range for natural gas?
5% and 15%
The primary objective during a natural gas leak is to control the leak by _____.
Shutting off the gas to the specific appliance if possible or shutting off the gas to the entire structure
What needs to be done if the fire department shut the gas off to a residence or business?
It needs to be tagged appropriately in the utility company notified
After the leak has been secured and ventilation has taken place what is the next step before turning the residents over to the homeowners?
Firefighters should repeat the monitoring process to ensure that no hazards exist before turning the scene over to the property owner
What information is located on a marking sign for natural gas pipeline?
What is being transported
The name of the pipeline
Telephone number
Where can natural gas leaks be detected if the the damaged line is in a void space?
Around light switches and electrical outlets
What is the proper sequence for shutting off the utility in either a leak or a fire situation?
1- at the appliance
2- at the meter
3- at the curb box
In commercial gas leaks where is the location of the valve that needs to be shut off to secure the gas?
It’s located prior to the regulator.
For outside gas leaks and other outside guess emergencies that engine company sell position where?
Prior to an upwind of the hazard areaand identify a adequate water supply
The general rule for apparatus positioning is no closer than ____ feet from the incident.
100’
Besides the first due engine company what is the minimum distance that the other units should position
300’
If personnel have an odor present when arriving on scene what should be done with the apparatus?
The apparatus shall be moved immediately
On a gas leak where should the 2nd Engine stage at?
At a hydrant outside of the hot zone and await orders from the initial crew before taking any action
Crews should avoid parking their vehicles over what during a gas leak?
Sewers, valve covers, and manhole covers.
During inside gas leaks where shall apparatus avoid parking at?
Avoid parking next to any side of the affected address. Units should not positioned directly in front of to the rear of or beside a building involved in a gas leak event.
If they outside gas leak is reported to be over a 2 inch line what should the incident commander do?
Upgrade to a hazardous materials response.
During an outside gas leak in the engine company is responsible for what?
Identifying a water supply, locate and secure the leak, and evacuate citizens.
What responsibilities does the first rescue or truck have on a outside gas leak?
Ventilation, metering, investigation of the exposure, and assisting the initial crew with their assigned task.
The officer of the first arriving unit shall do what on the outside gas leak?
Re-con The soon to determine the location and extent of the leak through eight on scene supervisor, contractor, or the person who reported the leak.
Who shall be called on all active gas leaks?
The utility company.
